We have an interesting chart for you. It graphs the relative amount of sentences containing statements about policy in Queen's speeches between 1945 and 2010. Higher bars mean more policy sentences. The width of the bars is determined by the relative length of the speech. Shorter speeches get thinner bars.

The point here is that since Beatrix became queen, speeches have become much longer, while the percentage of policy-containing sentences has dropped a little. In short: she likes to talk.